Cutter



Feb. 20, 1923.

J. T. M CULLOUGH CUTTER Filed May 20, 1922 Patented Feb, 220, 1923.

ll l d ll i (a; we e -3 n an i? m e it 3 1 ll lea e.

"JOHN .T. ji i cut'tocen, or sneer/tart;rnnnsvzvanm.

- C TTER; I

Application filedflday 20,

for its object to provide a cutter foruse in drilling holes and openings of particular shapes.

It is another object of the invention to provide a cutter of this character capable of being used to drill a bore considerably larger in diameter than the diameter of the cutter, and at the same time to drill the bore the depth desired, by manipulating the cutter.

It is a further object of the invention to provide a cutter of this character having a cutter headin the form of a disc from which blades extend for cutting in one direction, the ends of the blades extending over the periphery of the disc for cutting in another direction.

With these and other objects in view, the invention consists in the improved construction and arrangement of parts to be hereinafter more particularly described, fully claimed and illustrated in the accompanying drawings, in which Figure 1 is a front elevation of the cutter, one of the blades being shown in edge elevation, the remaining blades being hidden by the rotundity of the disc;

Figure 2 is a bottom plan View of the cutter; and

Figure 3 is a top plan view with the shank of the cutter being shown in section;

Figure 4 is a section on line l4l of Figure 3.

This cutter is intended to be used in connection with wood working or metal work i ng machines wherein bores of various sizes and shapes are made in metal or wood, for instance, in the drilling of fence rail openings in fence posts. 'ihcse openings must not only correspond in length to the width oi the fence rail, but correspond in width to the thickness of the fence rail.

It is possible to drill a hole of this type, or in other words, an oblong bore by the manipulation of a cutter comprising a shank capable of being mounted on a power op erated machine or a hand operated device.

This invention relates to cutters, and has to the shank 5.

blades 1%. blades 1e are disposed substantially garallel 1922'. sci-en No. 582,343."

is provided IVliill. a disc i considerably larger 11!. diameter The "end. portion (3 of the shank than tliediain eter oi. the shank. This disc forms the'body portion of the cutter. Projecting from the outer face 8 oi the disc are a plurality of blades 9. E chblade isrelativelywide at itsend l0 and tapers from its end 10 to its end 1L Each of the end portions 10 or" the blades is disposed at the central portion of the disc so that the blades cooperate to substantially provide conical cutting element. Any number or these blades may be provided, the blades being formed integral with the disc. The outer edge of each blade 9 is beveled to provide a cutting edge 12, the bevel, off course, being only on one side of the blade.

that the end portions 11 It will be noted of each of the blades 9 extend over the pe riphery of the disc .7, the cutting edge 12 of the end 11 extending over the periphery of the disc substantially in parallel relation Projecting from the inner face 13 of the disc, adjacent the periphery ofthe disc, is a plura ity of blades 14L, ,each blade having its outer vide a cutting edge 15, said cutting edge merging with the cutting edge 12 of the ad jacent blade so that each of the blades 14; cooperates with the adjacent blade 9 to providea continuous cutting element from the faceyll of the disc to the central portion of the outer face 8 of the disc. The inner edge 16 of each of the blades 1a tapers from the end of the blade to the face 13 of the disc so as to substantially brace each of the The cutting edges 15 of the to the shank 5, said edges being beveled simi lar to the beveled edges of the blades 9, that is, onlyone side oi: the edge of the blade is beveled. i

In the use of the cutter the blades 9 serve to cut the bore movement of the shank into the work. The blades 1e out the bore to the shape desired. such as elongated, oblong, ore. diameter considerably la ger than the diameter of the disc 7 bymoveine'nt oil the shank and cutter longitudinally of the "work. It will be noted that the cutting edge 15 of the face I4 is relatively long so that the cutting capacity of the blades 1% corresponds to the cutting taneously. By extending the cutting edges edge beveled to proto the depth desired upon l2 ofthe end portion 11 ofthe blades 9 over thevperiphery, said cutting edges merge with the cutting edges 15 of the blades 14, so that the blades 14: cooperate With the blades 9 to provide a continuous cutting element and as the periphery of the disc, in view of the projecting edges 12 of the blades, is disposed inwardly of saidblades, the disc does not interfere With the cutting operation of the device. At the same time the disc 7 7 serves to strengthen the cutting elements.

From the foregoing it will bereadily seen that this invention provides a novel form of cutter capable of being applied to any ma chine or hand operated device for cutting bores or sockets of various shapes and depths, and all of these features are possessed by a cutter that can be manufactured in large quantities for a small amount.

What is claimed is A cutter consisting of a shank, a disc on one end of the shank, a plurality of blades substantially radiating from the central portion of the disc, saidblades being tapered longitudinally from a point at the central portion of the disc to a point atthe periphery of thedisc, blades carried by the opposite faceof the disc, said blades having cutting edges disposcdparallel to the shank of the cutter and merging With the cutting edges of the first mentioned blades.

In testimony whereof I hereunto afiix my signature. I y i JOHN T. MOCULLOUGH. 

